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T-cell rich large B-cell lymphoma

T-cell rich large B-cell lymphoma
Left panel: this field shows a mixture of isolated, mildly atypical large lymphoid cells (red arrows) in a background of small lymphocytes (black arrows). The large cells stain positively for the B-cell marker CD20 (right upper panel), while the small lymphocytes stain positively for the T-cell marker CD45RO (right lower panel).
From Warnke, RA, Weiss, LM, Chan, JK, Cleary, ML, Dorfman, RF. Tumors of the lymph nodes and spleen. Atlas of tumor pathology (electronic fascicle), Third series, fascicle 14, 1995, Washington, DC. Armed Forces Institute of Pathology.
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